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Friends JD 430 Trans Issue


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#1 Texas Deere and Horse OFFLINE  

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Posted October 24, 2017 - 12:08 AM

Hey guys, a guy I went to school with back in the 20th century,😁 has a JD 430 that's building internal pressure in the transaxle and blowing out the vent on the case. I'm guessing he has a seal failure somewhere on the pump but never having been inside one, I can't tell him what or where to look. He's in the process of signing up here but I wanted to get him some answers to show him what this site is
All about.

Thanks guys.
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#2 Saylerjeff OFFLINE  

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Posted October 24, 2017 - 12:13 AM

Tnx for help my friend
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#3 Texas Deere and Horse OFFLINE  

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Posted October 24, 2017 - 12:30 AM

I hope we can get you a good answer to your issue Jeff.

#4 KennyP ONLINE  

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Posted October 24, 2017 - 05:34 AM

:wave:  Welcome to the Forum, Jeff!

Do you have a service manual for this?


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#5 boyscout862 OFFLINE  

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Posted October 24, 2017 - 09:39 AM

Welcome to GTT. Check in our Manuals Section for the transmission manual. It should have a troubleshooting section that can help you diagnose the problem. You are allowed 3 free document downloads per day. Good Luck, Rick



#6 Texas Deere and Horse OFFLINE  

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Posted October 24, 2017 - 11:41 AM

:wave:  Welcome to the Forum, Jeff!
Do you have a service manual for this?

  

Welcome to GTT. Check in our Manuals Section for the transmission manual. It should have a troubleshooting section that can help you diagnose the problem. You are allowed 3 free document downloads per day. Good Luck, Rick


Guys, we don't have any JD manuals here because of copyright laws.

#7 dropped82 ONLINE  

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Posted October 24, 2017 - 12:42 PM

I've completely ignored the fact they say to download a JD manual due to the "new guy" response haha. Has anyone checked the OP post count. Good to see you on here.

As for the 430, your saying it's pressurizing the rear axle and pushing fluid up the fill tube? Could it possibly be overfilled? Does it still move and lift? Only seal I can see being an issue is the one on the output shaft of the motor. Other than the pickup for the fluid, I think, is the only other connection between the pump/motor and rear axle.

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Edited by dropped82, October 24, 2017 - 12:46 PM.

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#8 dropped82 ONLINE  

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Posted October 24, 2017 - 12:48 PM

Tnx for help my friend

Welcome to Gttalk.com

Sorry guys, completely missed this post!!

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#9 Texas Deere and Horse OFFLINE  

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Posted October 24, 2017 - 01:15 PM

Thanks Eric, Jeff is in your area. Maybe you can contact him and give him some advice. He lives in Crawfordsville and haul corn syrup out of the old Staley plant in Lafayette.

I'm still around, just not been posting hardly any. But thank for the kind words!
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#10 boyscout862 OFFLINE  

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Posted October 24, 2017 - 01:31 PM

  
Guys, we don't have any JD manuals here because of copyright laws.

I thought that the transmissions were "generic" (like the engines) and the manuals might be available here. Good Luck, Rick


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#11 dropped82 ONLINE  

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Posted October 24, 2017 - 02:03 PM

I thought that the transmissions were "generic" (like the engines) and the manuals might be available here. Good Luck, Rick

I believe you are correct when it comes to the rear axles.

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#12 KennyP ONLINE  

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Posted October 24, 2017 - 04:06 PM

Problem is, which rear axle does it have! The Service Manual has a good section on it.


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#13 GardnMastr OFFLINE  

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Posted October 24, 2017 - 05:20 PM

The Peerless rear axle on the 430 came with clear hose, top and bottom, with a clear hard tube section between the hose clamps. This is the sight gauge for proper rear axle oil level. It sits approximately about the middle of the axle in height, usually mounted inside the right rear frame rail. Originally the rear ends were filled with red hydrostatic fluid. Probably about 1990 John Deere stopped supplying that and started using low viscosity Hyguard, and it was ok to mix it. The vent for the rear axle is a hole drilled into the white plastic fill elbow, top of the rear end and quite a bit above the oil level. A couple of ways that it could reach that height come to mind. Is it overfilled? Is the suction side of the hydro sucking air from a loose hose clamp? How about a pinhole in the suction hose up high, causing foaming of the oil. Water will steam under load and it does not lubricate at all. Water causes damage.
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#14 olcowhand ONLINE  

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Posted October 24, 2017 - 07:55 PM

The exact same hydro and rear end were used on the Simplicity Sunstar.  Have to check if we have that in the manuals section.


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#15 olcowhand ONLINE  

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Posted October 24, 2017 - 07:59 PM

If there was any kind of internal pressure leak, it wouldn't cause any pressure buildup, as it's all internal UNLESS there is a leak on the suction side pulling in air from the outside.  How much pressure is escaping the vent?


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